soheaubstabter



(NofModela-j- Y 2 ShBetsE-"Sheet I. G. SGHRAUBSTADT-ER;Jr.' & C.-R. SGHILLING.

BLOCK SHAVIN'Gr MACHINE.

PatentedDeo. 19., 1893.

mi NATIONAL LITNOGRAPNINB COMPANY WASHINGTON. n. e.

(No Model.) v I 2 Sheets-Sheet 2. G. SGHRAUBSTADTER, Jr.'& 0. R. SOIEIILLING;-

BLOGK SHAVI-NG MAGHINE.

No. 511,277; Patented Dec. 19, 1893.-

THE NATIONAL LITNDGRAFHING coMFANY.

wnummcmp. c.

UN TED STATES PATENT Drmcn.

CARL SOHRAUBSTAD'IER, JR, AND CHARLES R. soI-I LLINo, on sr. LoUIs,

MISSOURI, ASSIGNORS TO THE WESTERN ENGRAVERS SUPPLY ooM- PANY, OF SAME PLACE.

BLOCK-SHAVING MACHINE.

SPECIFICATION forming part of Iletters Patent No. 511,277, dated December 19, 1 893.

Applioationfiled March 16, 1893.

To all whom it may concern.-

Be it known that we, CARL SCHRAUBSTADT- ER, J r., and CHARLES R. SCHILLING, both of the city of St. Louis, in the State of Missouri, have invented a certain new and useful Improvement in Block-Shaving Machines, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification.

Our invention relates to certain improvements in machines for shaving or reducing blocks of wood, metal, or composition to a uniform thickness. It is particularly adapted for the purpose of shaving printing blocks down to the proper thickness.

Our invention consists in features of novelty hereinafter fully described and pointed out in the claims. v

Figure I is a plan or top view of our machine. Fig. II is a side view or elevation. Fig. III is a detail view, showing the interior of the clutch friction wheel, including the clutch eccentrics and their springs; the shaft of the wheel and the arbors of the eccentrics being shown in section. Fig. IV is a side view, part in section. Fig. V is a detail section, taken on line VV, Fig. VI. Fig. VI is a detail section, taken on line VIVI, Fig. V. Fig. VII is a transverse, vertical section, taken on line VII-VII, Fig. IV; Fig. VIII is a horizontal section, taken on line VIII-VIII, Fig. IV. Fig. IX is a front view of the automatic stop for limiting the movement of the table supporting wedge. Fig. X is a section taken on line XX, Fig. IX. Fig. XI is a view of one of the boxes in which the main shaft turns. Fig. XII is a similar view of the other box. Fig. XIII is a section, taken on line XIII-XIII, Fig. VIII, and illustrating the spring for holding the stop, of the table ad justing wedge, in position.

The power is applied to the machine by a belt passing over'the pulley 1. The pulleyl is secured to one end of a main shaft 2, journaled in boxes connected to the frame 2 of the machine. The box 3, at the pulley end of the shaft, has a pivotal connection with the seria1N0.4=66,S91. on. model.)

in a direction lateral to the length'of the shaft. The box 4, in which the other end of the shaft is journaled, is mounted in a slot5 in a frame, (or in a bracket 5 secured to the frame.) See Figs. V, VI and XII. In the slot 5, at the ends of the box 4, are springs 6 which tend to hold the box centrally in the slot until it is forced in one or the other direction. These springs may be adjusted by set-screws .7. On this endof the shaft 2 is a friction wheel or disk 8, preferably grooved, as shown in Fig. V, and which is adapted to be forced, by moving the shaft 2, into frictional contact with a large friction wheel 9, or by moving the shaft in the other direction, the wheel is forced into frictional contact with a small disk or wheel 10, having a hub 10; this latter disk or wheel being preferably of the same size as the wheel 8. If the wheel8 is grooved, the wheels 9 and 10 would likewise be grooved, and we have so shown them in Fig. V. The wheel 8 is rigidly secured to the shaft 2, and the wheel 10 is rigidly secured to a shaft 16, while the wheel 9 is loosely mounted on the shaft 16. The wheel 10 is hollowed out, as shown in Figs. III and V, to receive eccentrics 11 mounted on arbors l1, journaled inv the hub 9 of the wheel 9. These eccentrics are held against the inner face of the Wheel 10 by means of springs 12, which are also secured to the hub of the wheel 9. In Fig. III the eccentrics and springs are shown in their proper relative positions, although the hub 9 of the wheel'9 is removed in this figure. The largest diameter of the eccentrics 11 is slightly greater than the distance between the arbors 11, and the inner face of the wheel 10, so that if the wheel 9 is turned in one direction, the eccentrics 11 will clutch the wheel 10 and cause it to be turned with the wheel 9, while if the wheel 9 is turned in the other direction, the eccentrics will not and a crank 55. The cranks 52 and 55 are too connected respectively by links 56 to the sliding box at of the shaft 2, and it will be seen that by applying pressure to the proper treadle, the shaft 2 will be moved to force the wheel 8 into frictional contact with the wheel 9, and by applying pressure to the other treadle the shaft 2 will be moved to force the wheel 8 into frictional contact with the wheel 10.

When the cutter-head of the machine is to be moved forward to shave the block, the shaft 2 is moved to bring the wheel 8 into frictional contact with the wheel 9, which produces a slow forward movement of the cutter head. During this forward movement of the cutter head the eccentrics 11 clutch with the wheel 10. When the cutter head is to be run back, the wheel 8 is brought into frictional contact with the wheel 10, (the eccentrics 11 not clutching with the wheel 10, as explained) and thus a rapid backward movement of the cutter head is eufected. When the pressure which forces the shaft 2 laterally is removed, the wheel 8 assumes a position, (by virtue of the springs 6) midway between the bearing faces of the wheels 9 and 10 and the rotation of the shaft 2 is not then transmitted to either of the wheels 9 or 10, and consequently not transmitted to the shaft 16.

On the far end of the shaft 16 from the wheels 9 and 10 is a pinion 13, (see Fig. 11,) meshing into a gear wheel 14 secured to a shaft 15, upon which are mounted pinions 18 engaging racks 17, which slide upon the frame 2? of the machine, and which are connected to the head 19 which carries the cutter 20, and it will thus be seen that the movement of the shaft 16 will be transmitted to and effeet the movement of the cutter head. The cutter head has any ordinary form of slide connection with the frame of the machine. We have shown the frame provided with horizontal flanges 2", (see Fig. VII) with which the depending ends of the cutter head engage, as shown in Fig. II.

21 represents the table of the machine, upon which the block to be dressed is placed. From this table depends a number of ribs 22, (see Figs. IV and VII,) the lower surface of the ribs tapering upwardly toward the rear of the machine,as shown in Fig. IV. These ribs bear. against or rest upon ribs 23 of a wedge 24, which slides on the bottom 25 of the frame of themachine. (See Figs. IV, VII and VIII.) It will be understood that as the wedge is drawn forward, the table 21 will be raised, and when the wedge is moved backward, the table will fall, thus providing for the adjustment of the block, being dressed, to and from the knife. The block being dressed bears against a ledge 26 of theframe 2, which resists its forward movement under theforce of the cutter. The wedge 24 has a rib 24 provided with a. threaded socket to receive a screw 27 provided with a hand wheel28, by which it is turnedto draw the wedge forward, and raise the table 21.

It is important that the wedge should come to a positive stop, which is predetermined, so that the operator will know when the block is fully reduced. To effect this, we connect a plug or pin 30 with the cross-piece 24 of the wedge, preferably beneath the screw 27, as shown in Fig. IV. Loosely mounted on the screws 27, so as to turn thereon, is a head 31. (See Figs. IV and X.) This head 31 has a shank 32 made with an opening 33 to permit the passage of the screw, (see Fig. X,) the opening being slightly larger than the screw, or else the screw not being threaded where it passes through the opening 33, so that the head 31 is not turned by the screw, or affected by the turning of the screw, but the screw simply forming a support for the head. The shank of the head has a journal portion 34 which fits in an opening of the frame 2, as shown at 35, Fig. IV, and fitted on the shank beyond this portion 34 is a lever 36, fastened toit and held in place by a nut 37 fitted on the end of the shank. By-moving the lever 36, the head 31 may be turned.

38 represents a number of blocks or plugs fitted in openings in the head 31, and held from turning therein by pins 39, which, fit in grooves in the blocks, so as not to interfere with the end movement of the blocks.

40 represents springs located behind; the blocks to hold them normally in their outer position, as, shown in Fig. X. The stems 41 of the blocks extend beyond the base of the head 31, as shown in Fig. X, and these blocks are of slightly varying. lengths.

42 represents a set screw or stop pin fitted in the frame 2 directly in line with. the pin 30, and the inner end of which is adapted to receive the stem 41 of the block 38,. which. is in line with the pin 30. It will thus beseen that by operating the screw 27, the, wedge will be drawn. back until the pin 30. comes against the block 38, which is oppositetoit, the wedge continuing. to moveuntil the stem of the block comes up against the screw, 42, and then a positive stop is produced; and by adjusting. the head 31 so that either one of the blocks 38, (which as stated, have different lengths,) is brought oppositethe screw 30, the different limits of movement of the wedge is provided for.

For the purpose of assuring the stopping of thehead when one of the blocksisjdirectly opposite the pin 30, we employ a spring 45, as shown in Figs. VIII and XIII, this spring be ing connected. to the frame 2 and adapted to bear against two arms of the head,as shown, the arms of the head being preferably grooved, as shown at 5L6, to receive. the spring.

On the hand-wheel 28 isa pointer 37, which is adapted to be moved around the wheel, and which is held in a horizontal position by a projection 37 fitting in a groove in the wheel, as shown in Fig. IV.

In operating the machine, the workman revolves the hand-whee128 to recede the wedge. Ile then, by means of the handle 36turns the head 31, untilthe proper block is in line with the pin 30. By means of suitable marks on the bed or handle a stop of the proper length may be selected and placed in position. When the block stop carrier is in approximately its right position the spring 45 will bring it accurately into place. The operatorthen moves the pointer 37 in line with'anindex point 37", and places the block to be dressed on the table 21, with the front resting against the ledge 26. Pressing his foot on the right hand treadle he moves the friction wheel Sagainstthe internal periphery of the driving wheel 9. This brings the eccentrics 11 forward so that they engage with the internal periphery of the small friction wheel 10, and wedging tight they turn the shaft 16, and, by means of the connecting gear before described, cause the cutter to advance. The operator then removes his foot from the treadle when one of the springs 6 removes the friction wheel from the periphery of the large driving wheel, causing the forward movement of the cutter to stop. He then turns the hand wheel 28 backward lowering the wedge and allowing the knife to clear the work. Placing his foot on the left hand treadle, he presses the friction wheel 8 against the wheel 10, causing the cutter head to recede rapidly. As the head approaches the limit of its rearward movement, it strikes an arm 47, pivoted at 48, and pushes forward the sliding box 4, throwing the friction wheel 8 away from the wheel 10, and stopping the machine. The lever 47 has a set screw 47 for engaging thebox 4:. (See Fig. VI.) The machine would ordinarily be injured by the shock of the heavy friction wheel at stoppage or reversal at such a high speed, but with our construction, when the shaft stops, the eccentrics 11 allow the large friction wheel 9 to continue revolving, which it does without injury to the gearing of the machine, or unpleasant shock. The operator now againturns the hand wheel 28, so that the pointer 37 passes its oldposition, th us raising the bed for another shaving. He then returns the pointer, (by sliding'it on the wheel,) so that it again points toward the index point 37*. He again presses on the right hand treadle which brings the head forward and removes a shaving. He continues these operations until the wedge coming forward forces the stop block 38 against the stop pin 42. This prevents further forward motion of the wedge and consequently the upward movement of the table, making the resultingplates of auniformthickness,somethinglongdesired.

We do not wish to be limited to the exact construction of this stop mechanism, and it is evident that the pin 42 could be dispensed with, as well as the pin 30, and the same result, in a measure, accomplished by arranging the blocks 38 to have a varying amount of movement in their head 31, and allowing the wedge to come directly against the blocks, but we prefer to use the pins 42 and 130, as

explained.

table vertically, and an adjustable head pro-- vided with stop blocks adapted to limit the movement of said wedge; substantially as and for the purpose set forth.

2. In a'block shaving machine, the combination of a table, a wedge for moving the table vertically and which is provided with a pin 30, a movable head, and stop blocks of varying lengths located in said head; substantially as and for the purpose setforth.

3. In a block shaving machine, the combination of a table, a wedge, screw for operating the wedge, a stop pin, and one or more movable stops capable of being interposed between the stop pin and wedge.

4. In a block shaving machine, the combination of a table, a wedge for moving the table, and oneor more stop blocks adapted to limit the movement of the wedge; substantially as and for the purpose set forth.

5. In a block shaving machine, the combi-. nation of a table, a wedge for moving the table vertically, ahead having stop blocks and an adjustable pin 42; substantially as and'for the purpose set forth.

6. In a block shaving machine, the combination of a table, a wedge for moving the table vertically, a head having sockets to receive stop blocks, springs located behind said stop blocks, a pin 42, and a lever 36 for moving the head; substantially as and for the purpose set forth.

7 In a block shaving machine, the combination'of a table, a wedge for moving the table vertically, a head provided with stop blocks, and a spring 45; substantially as and for the purpose set forth.

8. In a block shaving machine, the combi nation of a table, a wedge for moving the table vertically, a screw for moving the wedge, a hand wheel on the screw, a movable head provided with stop blocks, and a finger mounted on said hand wheel, and having a pin engaging a groove in the hand-wheel; substantially as and for the purpose set forth.

9. In a block shaving machine, the combination of a table, a wedge for moving the table vertically, a head having sockets to receive stop blocks of different lengths, springs located behind said stop blocks and a lever 36'for moving the head substantially as and for the purpose set forth.

10. In a shaving machine, the combination of a table, wedge, a stop pin, and a movable stop capable 'of being thrown between the wedge and the stop pin, and provided with a spring to keep it from the stop pin, substantially as described.

CARL SOHRAUBSTADTER, JR. CHARLES R. SCHILLING. In presence of- ALBERT M. EBERSOLE, M. M. KINGSLAND.

IGO 

